Coil separating machine and method



Dec. 11, 1934.

L. A.- SHU EY COIL SEPARATING MACHINE AND METHOD 4 Sheets-Sheet 1 n. I Q 7 Q\ Filed Jan. 27, 1952 Dec. 11, 1934. A s U 1,983,642

COIL SEPARATING MACHINE AND METHOD Filed Jan. 27, 1952 4 sheets sheet 2 & J

Dec. 11, 1934. L; A. SHUEY 1,983,642

COIL SEPARATING MACHINE AND METHOD Filed Jan. 27, 1952 4 Sheets-Sheet 3 Dec, IT, 1934. L. A. SHUEY COIL SEPARATING MACHINE AND METHOD Filed Jan. 27, 1932 4 Sheets-Sheet 4 Patented Dec. 11, 1934 UNITED STATES PATENT OFFlCEy COIL SEPARATING MACHINE AND METHOD Application January 27, 1932, Serial No. 589,235

6 Claims.

This invention relates to improvements in machines for separating a plurality of coils wound on the same form, core or mandrel, into a plurality of individual coils.

One of the objects of this invention is to provide an improved form of machine for this purpose.

Another object of the invention involves a novel method of effecting this result.

These and many other objects as will appear from the following disclosure are secured by means of this invention.

This invention resides substantially in the combination, construction, arrangement, relative location of parts, steps and series of steps, as will be pointed out in detail in the following specification in connection with the attached drawings, and defined in the appended claims.

Referring to the drawings,

Fig. 1 is a top plan view of one form of machine of this invention, with one portion broken Fig. 2 is a cross sectional view along the line- 2-2 of Fig. 1;

Fig. 3 is a cross sectional view on the line 3-3 of Fig. 2;

Fig. 4 is a front elevational view of the machine with some portions broken away;

Fig. 5 is a longitudinal cross sectional View through the cutter arbor;

Figs. 6 and '7 are cross sectional views through the machine showing the parts in different positions;

Fig. 8 is an enlarged detail view of one of the cutter edges;

Fig. 9 is a cross sectional view taken on the line 99 of Fig. 8;

Fig. 10 is a top plan view of a modified form of machine employing, only one cutter;

Fig. 11 is a cross sectional view taken on the line 11l1 of Fig. 10;

Fig. 12 is an enlarged detail View.

It is common practice at the present time in the manufacture of coils, solenoids, transformer windings and the like, to wind up a plurality of coils simultaneously on the same mandrel, core or form. In accordance with one known practice, a plurality of independent coils are wound up on a cardboard core in the form of alternate layers of insulating strip and wire turns. The result is a unit comprising a plurality of independent windings longitudinally distributed along the cardboard or other tubular core, and longitudinally spaced so that each coil is separated on each side from adjacent coils by a relatively short space.

In another form of known practice a plurality of independent coils are simultaneously wound with alternate layers of insulation, on a single core or tube, but in this case the strips of insulating material extend throughout the length of the unit with the windings occurring at longitudinally spaced points so that although the insulation extends throughout the length of the unit, the windings occur in longitudinally spaced groups. In accordance with, present practice these individual coils are separated from each other by means of hand saws which is an exceedingly slow and tedious process, and has the further disadvantage that the vibration of the saw teeth, particularly in the second form of winding, causes the wire turns to loosen and escape from between the insulation layers at each end of the coils. In addition the hand saws employed very quickly become dull, and this tends to increase the vibration.

The invention of the present case involves a machine for separating the individual coils. In one form of machine all the coils of the unit are separated simultaneously. In another form of machine the coils are separated one at a time. The particular feature of the invention resides in the fact that the coil unit is revolved with a suit.- able power source and circular cutters with a particular form of cutting edge are driven at a slower rate of speed upon engagement with a revolving coil unit. The resultis that the cutters travel at the same rate of speed as the surface on which they are acting, and gradually cut their way through. without vibration. In addition, because of this action, the cutters do not tend to dull and may be used for a long time as the result.

The nature of the invention will best be understood by detail reference to the drawings. The device comprises abedplate or supporting frame 1 on which are mounted two spaced standards 2, each provided with a forwardly projecting arm 3. The left hand standard 2 has journaled in it a short stub shaft a provided with a handle 5 at one end and a collar 6 at the other end, which in turn is provided with two projecting diametrically opposite pins 8. A coil spring '7 lies between the arm 3 in which the shaft 4 is slidably mounted and the collar 6, thereby tending to urge it to the right (Fig. 2). J ournaled in the other arm 3 is a shaft 15 provided at its left hand with a collar 14, which in turn has the projecting pins 13, similar to the pins 8. The other end ofshaft 5 Cir- 15 is journaled in a bracket 16 and provided with a worm wheel 17 which meshes with a worm 18 mounted on the shaft of a suitable driving motor 19.

A supporting mandrel or arbor 9, having regularly spaced annular grooves 10 is provided at one end with sockets 11, and at the other end with sockets 12, positioned to receive the pins 8 and 13*respecti-vely. The mandrel 9 is mounted on the reduced ends 4 of shafts l and '15. The external diameter of this mandrel is such that it fits snugly into the tube T on which the individual coils C are wound. The mandrel 9 is slipped into a tube unit having a plurality of individual coils wound on it, and then secured in place as indicated in Fig. 2, by drawing shaft 4 to the left through the agency of handle 5. Spring 7 holds the parts in assembled position as indicated in Fig. 2. Extending between the standards 2 is a shaft 3 to which are secured near each end the arms .20. J ournaled in these as-indicated in Fig. 5, is a shaft 22 on which are mounted, between suitable spacing collars 22, a plurality of circular cutters 21. To one end of shaft 3' is secured an operating lever 23 by means of which the cutters may be swung towards and away from the mandrel '9 and the coils mounted thereon. A back-stop 24 is mounted so as to engage-arm 23 to hold theswinging structure in the position indicated in Fig. 7. The left hand arm is provided wit-ha 1ug26 which engages the adjustable .screw .25 in the bracket 25 to limit the forward .or counterclockwise swinging movement (Fig. 6)

of the cutter structure. By means of this adjustment the counterclockwise movement of the cutter frame is limited so that it will cut entirely through :the coils and .pass into the annular grooves 10 of the mandrel without striking the central portion thereof. Secured to the arms 20 is a suitable covering or hood 2? shaped to fit .over the cutters, and protect the operator, as clearly indicated in the drawings.

The shape of the cutter teeth which gives best results has been indicated in Figs. 8 and 9. The teeth are beveled on each side to give a sharp cutting and penetrating edge.

In the operation of the machine an actual unit consisting of a paper or cardboard core or tube T, having a plurality of individual coils C longitudinally spaced thereon is slipped upon the mandrel .9. Thisunit may be of either the'forms previously described. The mandrel is placed .on the machine as indicated in the various figures and motor 19 isstarted to revolve the mandrel and the I coils. The handle .23 is then grasped and the cutter frame is swung from the position shown in Fig. '7 to the position shown in Fig. 6, where the cutters engage the surface of the coils, in the case where they are wound with .a wide strip of insulating material which extends throughout the unit (Fig. 6), or to a position to engage the core T between the coils when the individual coils are wound with separate narrow strips of insulating material. By reason of this engagement the cutters begin to revolve at an angular speed equal to the angular speed of the coils. In other words there is no relative movenrent'be'tween the cutter teeth and the coils since the cutters are driven by reason of their engagement with thecoils. The result is that as pressure is applied to the cutter frame through the handie '23, the cutter teeth out into and penetrate the insulation of the coils, gradually forcing their way therethrough without introducing any vibration'into the coils. When the cutting operation coil unit comprising a plurality of coils C is mounted on this mandrel as before.

To permit this mounting of the mandrel bracket 51 is provided with an arcuate slot 54 through which a tightening bolt passes, so that the bracket can be swung to the right to release the mandrel when desired. A longitudinally slidable plate 53 is provided to which is secured by means of a plate 61 a bearing block 54 in which a short shaft 55 is secured. The bearing block 54 may be longitudinally adjusted and locked in place by means of set screw '64. Pivotally mounted on shaft 55 is an arm 56 on whichis secured a short stub shaft 57. Mounted on this shaft for rotation between the collars 58 is a circular cutter 59. This cutter is covered by a suitable protecting frame or hood 60. Secured to the cover plate 61 is a stub arm '71 which limits the clockwise rotation of lever 56. On the front of plate 53 is another stub 72 which may be locked in various vertical positions by means of the locking nut 62 to limit the counterclockwise rotation of lever 56. Plate 53 has a hole '53 therein of sufhcient diameter so that the plate may be slid along the support over the coils C.

In the operation of this form of the device mandrel 53" with the coils thereon is rotated from a suitable power source and plate 53, with its attached parts 54 to '72 inclusive is slid longitudinally along the support to a point between the coils in succession, and arm 56 is then pulled upwardly causing the cutter 59 to engage the coils and cut them apart. The stubs 71 and 72 limit the swing of the-saw support in either direction.

From the above description it will be apparent that my invention resides in certain principles of construction and operation which may be effected in other ways, as will be apparent to those skilled in the art, and I do not, therefore, desire to be strictly limited by this disclosure as given for purposes of illustration, but rather to the scope of the appended claims. r

What I seek to secure by United States Letters Patent is: I

1. A machine as described comprising, a support, chuck members rotatably mounted on the support, a work receiving mandrel held between said chucks, power means for revolving the chucks and mandrel as a unit, a cutter frame oscillatably supported adjacent the mandrel, a plurality of longitudinally spaced circular toothed cutters mounted for rotation on said frame, and means for swinging the frame 130 3. position so that the teeth of the cutter thereon engage the work on the mandrel and are rotated thereby.

2. A machine as described comprising, a support, chuck members rotatably mounted on the support, a work receiving mandrel held between said chucks, power means for revolving the chucks and mandrel as a unit, a cutter frame oscillatably supported adjacent the mandrel, a plurality of longitudinally spaced circular toothed cutters mounted for rotation on said frame,

means for swinging the frame to a position so that the cutters thereon engage the work on the mandrel and are rotated thereby, and limiting stubs for limiting the swing of the cutter frame in either direction.

3. A machine as described comprising, a support, chuck members rotatably mounted on the support, a work receiving mandrel held between said chucks, power means for revolving the chucks and mandrel as a unit, a cutter frame oscillatably supported adjacent the mandrel; a plurality of longitudinally spaced circular toothed cutters mounted for rotation on said frame,

means for swinging the frame to a position so that the cutters thereon engage the work on the mandrel and are rotated thereby, and a protecting hood partially enclosing the circular cutters.

4. A machine as described comprising, a support, chuck members rotatably mounted on the support, a work receiving mandrel held between said chucks, power means for revolving the chucks and mandrel as a unit, a cutter frame oscillatably supported adjacent the mandrel, a plurality of longitudinally spaced circular toothed cutters mounted for rotation on said frame, means for swinging the frame to a position so that the cutters thereon engage the work on the mandrel and are rotated thereby, and a protecting hood secured to the cutter frame and partial- 1y enclosing the circular cutters.

5. In a machine as described the combination comprising a support, a power driven chuck rotatably mounted on the support, a longitudinal- 1y slidable spring pressed chuck member mounted on the support in alignment with the first mentioned chuck, a mandrel detachably engaged by the chuck members, a cutter frame oscillatably mounted on the support, and a plurality of circular toothed cutters rotatably mounted on the frame to be engaged by the work on the mandrel and driven thereby.

6. In a machine as described the combination comprising a support, a rotatably supported work receiving mandrel, a circular toothed cutter rotatably mounted on said support by engaging the work, means for swinging the cutter into and out of engagement with the work on the mandrel, and an adjustable stud for" limiting the movement of the cutter in work engaging direction.

LLOYD ARTHUR SHUEY. 

